A new species of Grylloblattida, Ideliopsina aristovi sp. nov., is described from the Upper Triassic Ominé locality (Momonoki Formation, Mine Group, Japan). It belongs to a typical Triassic genus, Ideliopsina Storozhenko, 1996, which species have been previously reported from the Kyrgyz Republic and the Kazakhstan in Central Asia. The new species shows that the corresponding family, the Ideliidae ranging from the Cisuralian to the Late Triassic, remained widely distributed during the latter period, before its extinction.

The dataset contains two RTI (Reflectance Transformation Imaging) of the fossil specimen MMHF-3-00101 (Mine City Museum of History and Folklore, Japan), with 'p' in the file name accounting for 'part' (wing viewed as if observed dorsally) and 'cp’ accounting for 'counter-part' (wing viewed as if observed ventrally).

Each RTI file composing this dataset was derived from a set of 54 photographs obtained using a light dome of about 30 cm in diameter and equipped with 54 LEDs. Both the light dome and camera (a Canon EOS 5DS equipped with a MP-E 65 mm macro lens, all Canon, Tokyo, Japan) were driven by a control box (dome and control box, Flydome, Paris, France). Obtained images were then batch-optimized using Adobe Photoshop CS6 and were further compiled into an RTI file using the RTI Builder software v. 2.0.2 using the HSH fitter (software freely available from Cultural Heritage Imaging, San Francisco, CA, USA).

The RTI files composing this dataset can be opened using RTIviewer (software freely available from Cultural Heritage Imaging, San Francisco, CA, USA).